Machine for grinding locomotive-frames.



No. 888,604. PATENTED MAY 26, 190s.

v A..- PORSYTH. MACHINE FOR GRINDING LOGOMOTIVE FRAMES.

APPLICATION FILED APRH-ZO, 1906.

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A. FORSYTH.

MACHINE FOR GRINDING LOGOMOTIVB FRAMES.

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APPLICATION FILED APILZQ, 1906.

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A. FORSYTH. MACHINE PoR GRINDING LOGOMOTIVE FRAMES.

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No. 888,604. PATENTED MAY 26, 1908. A. FORSYTH. MACHINE FOR GRINDINGLOGOMOTIVE FRAMES.

APPLICATION FILED APR. 20. 1906.

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ALEXEANDER ironsyrn,

OF AURORA, ILLINOIS.

MACHINE FOR GRINDING LOCOMOTIVE-FRAMES.

Specification of Letters Patent.

Patented May 26, 1908.

Application filed April 20, 1906. Serial No. 312,831.

To all whom it may concern:

Be it known that I, ALEXANDER FonsYTH, a citizen of the United States,residing at Aurora, in the county of Kane and State of Illinois, haveinvented certain new and useful Improvements in- Machines for GrindingLocomotive-Frames, of which the following is a specification.

My invention relates to grinding machines, and has for its object toprovide a machine of this type adapted for use in grinding the jaws oflocomotive frames in place of filing them.

My invention consists in the details and combinations hereinafterdescribed and claimed.

In the accompanying drawingsFigure 1 is a front elevation of a portionof a locomotive frame, showing my grinding machine in position foroperation. Fig. 2 is a sectional end elevation on the line 2 of Fig. 1.Fig. 3 Fig. 4 is a top plan view of the grinding device. Fig. 5 is asectional View of the grinding device, taken on the line 5 of Fig. 1.Fig. 6 is a bottom plan view of my improved grinding device, partly insection. Fig. 7 is a sectional view on the line 7 of Fig. 4. Fig. 8 is atop plan view of the clamp. Fig. 9 is a top plan view of a part of thesupporting frame, partly in section.

In the drawings, a represents a locomotive frame, having, as is usual,the jaws a, a the inner face of the jaw a being vertical and the innerface of the jaw a being inclined as shown in Fig. 1.

1; represents, generally, my improved grinding machine, comprising asupporting frame, having vertical members I) connected at the top by theclamping member I)? and at the bottom by a suitable connecting block bthe members 6 being rabbeted on their inner sides to form dovetailedguides or ways, for a purpose hereinafter described. Formed integrallywith these vertical members is a cross bar 6 extending laterally fromeach side of the vertical members, and provided with recesses I), I2 toallow the passage of the movin parts of the grinding device. ThelateralIy extending portions of this horizontal bar are secured toortions of the locomotive frame by suitab e clamps b, as indicated inFig. 1.

The clamp for securing the supportin frame atithe top is formed ofjlalhorizonta member 6 and a downturned vertical member 6 the member b beinsecured by suitable bolts b to the vertica members of the supportingframe.

6 indicates a screw passing through the downturned end 12 and bearingagainst the locomotive frame for securing the supporting frame inposition.

0 indicates, generally, my im roved grinding machine, comprising a shing block 0, sliding in the dovetail ways formed in the inner faces ofthe vertical members of the supporting frame.

0 represents, generally, my improved grinding or cutting device, and can air motor connected by a train of gears c with the grinding device.

0 represents a supply pipe for furnishing compressed air to the motor.

Referring now more especially to Figs. 4 and 5, these figures show thedetails of my improved grinding device. As before stated, this grindingdevice is secured to the sliding block 0, and consists of a frame 0,having outwardly extending arms 0, 0 formed at their outer ends withbearing recesses, which recesses form one-half of the bearing for ashaft dthe other portions of the bearing 0 being suitably secured bybolts, orother fastening devices, to the outwardly extend-.

ing portions 0, 0 At one side, on the left,- as shown in Fig. 5the shaft(1 is supported directly in its bearing. On the other side, a gear wheel0 forming a part of the train of gears 0 is mounted upon the shaft, theshaft and gear wheel being keyed together by a key cZ *the shaft beingprovided with a key-way d permitting the shaft to slide longitudinallywith respect to the gear wheel, but turned therewith.

The gear wheel a is mounted in the bearing in the arm 0 the collar ofthe gear wheel being formed with a circumferential groove 0 receivingthe bearing and preventing longitudinal movement of the gear wheel. Onthe ends of this shaft are mounted the grinder e. The shaft is formedmidway of its length with spaced collars d, and a nut d is mountedtherebetween. Adjusting screws (1, provided with plain end portions orend bearing portions (F, are mounted in the outwardly extending bearingarms 0 0 the v screw threaded portion of these screws passing throughscrew threaded perforations in the nut (i These screws are operated by aworm shaft (1 having worms d formed thereon, engaging worm wheels (i onthe ends of the screws. A hand-wheel d is provided on the shaft (Z foroperating it. It will now be readily understood that when the hand-wheel(Z is turned, the shaft (1 is moved to one side or the other to bringthe grinder e into engagement with one of the faces of the locomotiveframe jaws. As

shown in Fig. 1, the grinder wheel a is in en Ta'rse that side of theclamp b in which the gagement with the vertical jaw of the frame.

f represents an elongated screw mounted between the vertical members ofthe supporting frame, as indicated in Figs. 1, 3, 4, 5 and 7. It has abearing f at the top of this frame, and is provided with a head f. Thiselongated screw passes through a screw threaded lug or block 9 securedto the rear of the sliding block 6 upon which the grinding device andits motor are mounted. Thus it will be seen that when the screw isrotated, the grinding device and the motor are caused to travel up ordown, depending upon the direction of rotation of the screw. At itslower end the screw passes through a worm wheel 71, having an elongatedcollar h, as

clearly shown in Fig. 7. The screw is keyed to this worm wheel so as toturn therewith, at the same time having a longitudinal movementtherewith, as will be readily understood. The worm wheel h is rotated bya worm h mounted upon a shafth secured in suitable bearings beneath themotor.

72, represents a gear on the worm shaft h which gear engages a gearWheel forming a part of the train of gears 0 Thus it will be seen thatwhen the motor is in operation, not only does it operate the grindingdevice, but it also operates the raising and lowering device for feedingthe mechanism vertically.

The train of gears 0 consists of the gear wheels 0", 0 0, 0 e and 0 Thegear wheels 0 and 0 are mounted upon opositel extending arms 7c, k of aswinging frame which is mounted for swinging movement upon the shaft 72This frame is providedwith a handle k u on which is mounted a pivotedlocking lever having an angular extension 76 at one end, which engageswith one of a series of recesses Z in the segment Z secured to the motorframe. By operating this lever, the frame 76 may be swung so as to bringeither one of the gears 0 or 0 into engagement with the gear 0 Thus isprovided a means for changing the direction of rotation of the grindingwheels and of the feeding device, as will be readily understood.

As shown in Fig. 1, the parts are in osition to operate upon thevertical jaw of the locomotive frame. When it is desired to operate uponthe inclined jaw, the grindin wheels are shifted through the hand-wheel(Z ,as before describedand in order to brin the surface of the grindingwheel into parallel relation with the surface to be operated upon, Iprovide the following devices. The clamp b is provided with an adjustingscrew m passing through the horizontal member of the clamp and engagingthe top of the locomotive frame at one side of its longituidinal center.When it is desired to bring the grindin wheels into parallel relationwith the inc ined jaw, the clamps b 6 are loosened and the screw mturned so as to screw is mounted. This will cause the supporting frameand the mechanism carried thereby to tilt slightly. When in properposition, the clamp b is tightened and the clamps 6 again applied, so asto secure the lateral extensions of the horizontal bar b to the portionsof the locomotive frame.

It is believed that the operation of my improved grinding machine willbe under stood without further description.

On reference to the drawings, it will be seen that the locomotive frameis substantially U-shaped and that the machine which embodies myinvention is designed and adapted to grind the inner faces of the legsof the U. It will also be observed that the frame of the machineconsists of two members crossing each other at right angles, thus makinga cross-shaped frame. One end of one arm of the cross is adapted to beattached to the base of the U-shaped frame and both ends of the otherarm of the cross are adapted to be attached to the frame at itsrespective sides.

I claim:

1. A machine for facing locomotive frame jaws having in combination asupporting frame, means for attaching the supporting frame to thelocomotive frame jaws, a carriage adjustably mounted on said supportingframe, a rotary grinder comprising a shaft and grinding wheels and amotor for operating said grinder mounted on said carriage, meansconnected to the motor and actuated thereby for automatically moving thecarriage on the frame, and means for moving the grinder shaftlongitudinally thereof relatively to the carriage.

2. In a machine for facing locomotive jaws, a supporting frame, acarriage adjustably mounted on the frame, a rotary grinder comprising alongitudinally adjustable shaft having grinding wheels mounted on thecarriage, a motor also mounted on the carriage and connected to thegrinder for operating the grinder, and means whereby the carriage isautomatically adjusted when the motor is in operation.

3. In a machine for facing locomotive frame jaws comprising a supportingframe having a grinder and a motor adjustably mounted thereon, saidgrinder comprising a shaft having grinding wheels at each end thereof,means for connecting the supporting frame to the locomotive frame, andmeans for adjusting the position of the supporting frame With referenceto the locomotive frame Jaws.

4. A machine for grinding the inner faces of the legs of a U-shapedframe, comprising a supporting frame having the general shape of across, one end of one arm of the cross being adapted to engage the baseof the U-shaped frame and the ends of the other arm being adapted toengage the U-shaped frameat the sides thereof, a motor mounted on thecrossshaped frame, and a grinding member driven by said motor.

5. A machine for grinding the inner faces of the legs of a U-shapedframe, comprising a supporting frame having the general shape of across, one end of one arm of the cross being adapted to engage the baseof the U-shaped frame and the ends of the other arm being adapted toengage the U-shaped frame at the side thereof, a carriage mounted on thecross frame and adapted to reciprocate parallel to the legs of theU-frame, a transverse shaft on the carriage having grindingwheels ateach end thereof, a motor on the carriage, and gearing connecting thesaid shaft and motor.

6. A machine for grinding the inner faces of a U-shaped frame withslightly diverging legs, comprising a supporting frame adapted to bepivotally secured at one end to the base ALEXANDER FORSYTH.

Witnesses: 1 T2 MILTON Z. SIMs, r 7 FRANK ZELENY. j";

